I really can't see any age limit. Most Sprayers will be younger, due to having a rebellious nature and being more physically capable of sprinting across the city at night. But an older character would be feasible. 

Also, I retract what I said about it being too crowded. I just updated the character list. Holy crap this took off way more than I thought it would. 

Anyone who has expressed interest already (Chantilly, Mercenary, Trapezoid, etc.) can submit a CS. Gisk had also discussed a second character with me, so that's good to go. But aside from those, I think I'm going to have to cut off any newcomers. Huge apologies to anyone who comes along from this point onwards, but I have to be able to keep track of you all!